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US2267911A
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Assignee: Industrial Patents Corp
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Filing: 1938-08-22
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Granted: 1941-12-30
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Expires: 1958-08-22
Abstract
No abstract record available.
Inventors
- 👤 Donald P Grettie
- 👤 Warren D Roth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:23
CPC Classifications
A; A23; A23G; A23G9/00; A23G9/32; A23G9/325; A23G9/44; A23G9/46
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1944-12-29 | 1945-06-30 | 1945-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1948-12-29 | 1949-06-30 | 1949-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1952-12-29 | 1953-06-30 | 1953-12-30 | $7700.00 | Window Closed / Lapsed |